赵振铎, 陈金虎, 原凌云, et al. Structure and Mechanical Properties of Welded Joint of ∅336 mm x 31 mm Pipe of Martensite Heat Resistant Steel P91[J]. Special Steel, 2015, 36(1): 60-61.
赵振铎, 陈金虎, 原凌云, et al. Structure and Mechanical Properties of Welded Joint of ∅336 mm x 31 mm Pipe of Martensite Heat Resistant Steel P91[J]. Special Steel, 2015, 36(1): 60-61.DOI:
The welding process with tungsten-arc inert (argon)-gas (TIG) backing
shielded metal-arc welding (SMAW) covered electrode filling and capping on P91 steel tube (/%: 0. 09C
0.45Si
0. 32Mn
8. 9Cr
0.95Mo
0. 21V
0. 78Nb
0.014A1
0. 05N) has been carried out by using ER90S-B9 welding wire and covered electrode (/%: 0. 08 ~0. 12C
0.4~0.6Si
0.5 ~1.4Mn
8.5 ~10.5Cr
0.85 ~1. 15Mo
0. 18-0.29V
0.06~0.10Nb
≤0.015A1
0. 03 ~0. 07N). Results show that the welded joint of P91 steel tube without crack
sla^ inclusions
crater and blowhole etc welding seam defects
the structure of welding seam is tempered sorbite with tempered martensite in partial region and the structure of base metal and heat affected zone is tempered sorbite;
of welding joint the mechanical properties are tensile strength R
m
653 ~ 665 MPa
yield strength R
p0.2
497 〜504 MPa
elongation A 21.8% ~ 22
9%
and impact energy 63. 8 ~77. 2 J all meet the requirement of standard GB5310-2008 and AMSE SA 335-2007.